Question
Physics Question on Gravitation
A comet orbits around Sun in an elliptical orbit. Which of the following quantities remains constant during the course of its motion?
A
Linear velocity
B
Angular velocity
C
Angular momentum
D
Kinetic energy
Answer
Angular momentum
Explanation
Solution
When comet orbits around Sun in an elliptical orbit, it is under action of a central force and its angular momentum remains constant.